Steam or gas turbine.



No. 705,890. Patented July 29, I902.

H. ZOELLY.

STEAM 08 GAS TURBINE.

(Application filed Max. 81, 1902.)

2 Sheets-Shoat I.

(No Il odel.)

2 sheets-sum 2.

No. 705,890. Patented My 29, 1902.

u. ZOELLY. I

STEAM 0R GAS TURBINE. (ApplicI -tion filed. Max. 81, 1902.) (No Model.)

UNITE STATES ATENT" OFFICE.

HEINRICH ZOELLY, OF ZURICH, SWITZERLAND.

STEAM OR GAS TURBINE. I

SPECIFICATION forming part of Letters Patent No. 705,890, dated July 29, 1902.

Application filed March 31, 1902. Serial No. 100,733. (No model.)

To (ZZZ whom, it may concern.-

Be it known that I, HEINRICH ZOELLY, engineer, a citizen of the Republic of Switzerland, residing at Zurich, Switzerland, have invented new and useful Improvements in Steam or Gas Turbines, of which the following is a specification.

This invention has reference to means for controlling the speed of steam or gas turbines,

and comprisesapparatus in which the inlet-' of details drawn to a larger scale.

a is a turbine wheel mounted on a shaft 19, and c are inlet-nozzles which communicate with an annular passage 6 in the turbinecasing f.

g is a governor which is driven from the turbine-shaft by means of an endless chain, and the sleeve of which is connected by means of a lever h and a link 72.. to the rod 71/2 of a piston-valve is, Fig. 3, which moves in a controlling-cylinder 11.

Small regulating-cylinders Z, the number of which is equal to that of the inlet-nozzles 0, Figs. 1 and 2, are mounted on the turbinecasing f, and each cylinder contains apiston n, which carries a regulating-pin m and is loaded by a spring q. The space on the side of the piston of each regulating-cylinder opposite to that on which the spring is located is in communication through a pipe 0 with the controlling-cylinder t, to the under side of which there is connected a pipe 19 for the purpose of supplying pressure fluid, such as steam or the like. The controlling-cylinder 'Z communicates through a pipe 1 with the atmosphere.

When the turbine is in operation, the movement of the sleeve of the governor g is transmitted, by means of the lever h, the link it, and the red 7112, to the piston-valve Z0. According to the'position of the piston-valve it the pressure fluid is admitted to one or more of the regulating-cylinders Z on the side of the piston opposite to that on which the spring q is located, so as to move the piston or pistons 91 in the cylinder or cylinders Z against the action of the spring or springs q, and thereby to open the inlet nozzleor nozzles a, while the piston or pistons 00. of the regulating cylinder or cylinders Z, which communicates or communicate with the pipe 1" by reason of the position of the piston-valve, is or are moved by the spring or springs q in the regulating cylinder or cylinders Z, so as to close the corresponding inlet nozzleor nozzles by means of the regulating pin or pins m.

The hereinbefore-described controlling apparatus is applicable to simple or compound turbines, and in the case of compound turbines the regulating-cylindersl of all the turbine wheels can be controlled by a single controlling cylinder i, so as to close or open the inlet nozzle or nozzles without throttling the steam, and thus retain the eflioiency of all the turbine wheels uniform at all powers.

Having now particularly described and ascertained the nature of my said invention, I declare that what I claim is-- 1. In a steam or gas turbine, a plurality of inlet-nozzles, an independent valve controlling each nozzle and a piston-valve controlled by the speed of the turbine to separately actuate said valves, substantially as described.

2. In a steam or gas turbine, a plurality of inlet-nozzles, an independent valve controlling each nozzle normally closed and actuated by motive fluid, and a piston-valve controlled by the speed of the turbine to admit and cut off motive fluid to and from said valves in succession, substantially as described.

3. In a steam or gas turbine, the combination with the turbine wheel, of an annular motive-fluid passage surrounding the wheel, a plurality of nozzles leading from the passage, a motive-fluid-actuated valve to control each nozzle and governor-actuated means to control motive fluid to said valves, substantially as described.

4:. In a steam or gas turbine, the combination with the turbine wheel, of an annular motive fluid passage concentric with the wheel, a plurality of nozzles leading from the passage, a cylinder, a loaded piston and a valve connected to the piston for each nozzle, and a governor-controlled piston-valve to admit and cut ofi motive fluid to and from said valves successively, substantially as described.

5. In a steam or gas turbine, the combination with the turbine wheel, of a plurality of inlet-nozzles, a regulating-pin for each nozzle to control motive fluid thereto, cylinders, a piston in each, and springs to load the pistons, each pin connected to a piston, a separate pipe connection to each cylinder, 3. controlling-cylinder to which each pipe is connected and a piston-valve, controlled by the speed of the turbine, in said controlling-cylinder to admit motive fluid to and cut it off from the first-mentioned cylinder in succession, substantially as described.

6. In a steam or gas turbine, a plurality of inlet-nozzles, an independent valve control- HEINRICH ZOELLY.

Witnesses MORITZ VEITH, A. LIEBERKNECHT. 

